The material feels sturdy and protective and stays well in place when the waves decide to take you for a tumble.
I have larger hips, so I sized up according to my hip measurements to get the perfect level of comfortable cheekiness for me. 26" waist, 37.75" hips, bought size M.
Love the fit of this bottom! Really lives up to its 'cheeky' name. Didn't have to readjust it in the water too much. :)